/Engine/Source/Runtime/Engine/Classes/Engine/AssetManager.h
Changes the default management rules for a specified type
virtual void SetPrimaryAssetTypeRules ( [FPrimaryAssetType](API\Runtime\CoreUObject\UObject\FPrimaryAssetType) PrimaryAssetType, const [FPrimaryAssetRules](API\Runtime\Engine\Engine\FPrimaryAssetRules) & Rules )